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Finding the Fourth Proportional to 647.16, 971.34 and 262.44

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Solution

The fourth proportional to 647.16, 971.34 and 262.44 is: 393.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.16 : 971.34 = 262.44 : x
  2. Step 2: Convert to fraction form
    647.16/971.34 = 262.44/x
  3. Step 3: Cross multiply
    647.16x = 971.34 × 262.44
  4. Step 4: Simplify right side
    647.16x = 254,918.47
  5. Step 5: Solve for x
    x = 254,918.47/647.16
  6. Step 6: Final answer
    x = 393.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.